Author Topic: September 12, 2011 - Drag Week 2011, Day 1 and OUT!  (Read 43002 times)

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jayb

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #60 on: October 06, 2011, 07:48:18 PM »
YES, there are updates, and one surprising one.  I have more tests to run this weekend, so I will update this thread on Sunday...
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

WConley

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #61 on: October 07, 2011, 01:28:23 PM »
Cool!  Can't wait.   :)
A careful study of failure will yield the ingredients for success.

plovett

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #62 on: October 07, 2011, 04:48:49 PM »
I can't wait to hear it either.  I hope it's the answer to the 150 hp loss.

paulie

jayb

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #63 on: October 07, 2011, 06:47:31 PM »
Didn't mean to get anybody's hopes up on this; the engine is still in the car, and I'm still fooling around with the crank trigger setup, so I have more information on that to add here.  I plan to pull the engine by the end of this month, and maybe when I tear it down I'll find out about the power loss.  I do have a couple more engine projects that I'm working on in the meantime, and will post some information on those this weekend...
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

machoneman

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #64 on: October 08, 2011, 07:35:40 AM »
Got it! We all look forward to your posts.

But, on the engine removal only later this month, didn't you have coolant leakage? I wonder about rust on your steel/iron parts........
Bob Maag

jayb

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #65 on: October 09, 2011, 09:39:36 PM »
Got it! We all look forward to your posts.

But, on the engine removal only later this month, didn't you have coolant leakage? I wonder about rust on your steel/iron parts........

I drained all the coolant and oil from the engine when I got back from Topeka, so I'm not really too worried about that part.
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

jayb

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #66 on: October 09, 2011, 09:58:22 PM »
So, after all the cranking tests I ran when I got back from Drag Week, and after finally seeing a solid RPM signal on the computer, and the alternately flashing LEDs on the ems-pro, I figured I had this problem more or less solved.  The only bad thing I saw was that it seemed to take 5-6 seconds for the ems-pro to sync up to the sensor signal and start behaving correctly.

About a week after I posted that, Scott came out from under his Engine Masters project for a brief period and read my posts.  He sent me an email that said the alternately flashing injector LEDs, which I had taken as a sign of success, were not actually supposed to appear until the engine started running faster than 300 RPM.  During cranking the injector LEDs were supposed to flash in unison with the crank sensor LED.  So, it appeared that I didn't have the problem resolved after all; cranking speed on the engine was only 105 RPM, so the LEDs should never have started flashing alternately like they did.

Scott suggested that I invert the signal from the VR sensor.  This is a change to the DIP switch settings on the ems-pro, so was fairly simple to try.  Today I hooked the laptop up to the ems-pro again, and after confirming the same behavior that I saw last time, reset the DIP switches to invert the VR sensor signal.  Unfortunately this made no difference in the performance; the ems-pro LEDs behaved exactly as they did before, which is to say that the injector LEDs were flashing synchronously with the crank sensor LED, and the RPM signal was all over the map.  Then, after 5-6 seconds the RPM signal settled down and the injector LEDs started flashing alternately.  So apparently this is still not correct; what I'm looking for is the injector LEDs and the sensor LED to flash simultaneously, and the RPM signal to be steady on the computer screen.

In an effort to help the ems-pro see the sensor signal, I have acquired a 60 tooth wheel, shown in the photo below:



This wheel has two missing teeth in a row, and hopefully this gap will be more recognizable for the ems-pro than the single tooth gap that the Ford 36-1 wheel has.  I'm going to try to get this wheel machined for fit and installed on the engine next weekend for testing.  I was going to do that this weekend also, but getting my high riser project together ended up taking most of my time (see the new Member Projects board).

One other note is that I brought a Gaussmeter home from work last weekend to check for any teeth on the existing wheel that may have been magnetized.  I did see some minor magnetization, but it was about the same magnitude as the earth's magnetic field, which isn't much, so I don't think this is an issue.

I should have another update next weekend.
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

jayb

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #67 on: October 23, 2011, 08:05:15 PM »
Over the weekend I got the 60-2 toothed wheel installed on the engine; here's a photo:



I was also able to Mickey Mouse the sensor into position with a 1-2-3 block from my machine tool cabinet and a C-clamp.  Tests with this wheel looked better than with the 36-1 Ford wheel; right away the RPM signal was more stable, and the tach LED and injector LEDs were flashing in unison as Scot said they would.  I'm still getting an RPM reading that shifts somewhat though; it will hang at 105 RPM for a while, then drop to 52, then go to 210 or so, and then go back to 105.  Also played a little bit with the airgap between the wheel and the sensor, but without any concrete improvements.

At this point I'm leaving this testing behind.  Next weekend the engine is coming out of the car and will be getting torn down.  Long before it goes back together, I'll have my new high riser engine on the dyno, and I plan to run the same 60-2 wheel and VR sensor on that engine.  I'll continue the experiments on that engine, and hopefully nail down a combination that works every time.
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

machoneman

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Re: September 12, 2011 - Drag Week 2011, Day 1 and OUT!
« Reply #68 on: October 24, 2011, 08:47:59 AM »
Good to see you're making progress on this issue Jay.

A house-keeping tip though: this series of posts is getting mighty long! Maybe start a new post using Drag Week 2011, redux? Just a thought.
Bob Maag